Overview Brief Description: Department 489 is part of the Integrated Power Systems (IPS) Directorate which is responsible for developing the COLUMBIA Class (CLB) state-of-the-art electric drive propulsion system. D489 is responsible for the development and construction support of the electric drive system (drives, controls, and power distribution). General Description: In support of electric drive design efforts, D489 has an Emulation Lab that manages the computer systems which are used to aid